disco nap

People who live in cities that do not have nighttime public transit and intend to attend a nighttime party will stay at the party for the entire night. In order to stay awake through the party they will take a nap during the day before preparing to go out. This is called a "disco nap".

Brad: Hey, I don't know if I can go out to the party tonight, I feel kinda tired.
Chad: Dude, take a disco nap, then you'll be energized all night.